'Performance' Distributor?

I used the plate on mine for a short period of time. I got about 16 out of the 10 slots on the plate, because it's not made for the slant 6, although it does fit. I ended up removing the plate, welding the governor slots and filing them to the proper 10 crank degrees. Now I have about 21 initial and 31 total. Just right.

Even the V8 you can’t get over 18 initial. They are precise and repeatable but not accurate on the specified value.